I used to have a similar problem Vinkman. I found, in any airframe, to get a better and more natural "looking around the seat" six view, I lean back in my chair a little when I re-center TrackIR. Then when flying and sitting normally, my TrackIR view position is more like a pilot leaning a little forward into the gun site. It has the double bonus of giving me a better gun site view and a little easier time looking behind me around the seat.
If I have time, I'll post some screen shots in a bit.
EDIT TO ADD:
View leaning back a little when I re-center TrackIR

View when sitting normally

View to the rear when I turn and lean slightly to the right
